Exodus 19:10 King James Version (KJV) And the Lord said unto Moses, Go unto the people, and sanctify them to day and to morrow, and let them wash their clothes, Exodus 19:22 King James Version (KJV) And let the priests also, which come near to the Lord, sanctify themselves, lest the Lord break forth upon them. As we prepare to worship God As we prepare to praise God As we prepare to reverence and honor God, we should sanctify Sanctify is to set to be set apart as or to be declare holy; consecrate - cleansed, purified. In the above text God provided prophetic instructions to Moses to give to the people and the message was clear, God ??said clean yourself up, wash your clothes and put on clean clothes and right here let's go to??Psalm 51:10, Create in me a clean heart, O God; and renew a right spirit within me.